package com.itheima.ZuoYe;

public class Test02 {
    public static void main(String[] args) {
        int arr[] = {1,2,3};
        String s = arrayToString(arr);
        System.out.println(s);

    }
        public static String arrayToString(int arr[]){
        StringBuilder sb = new StringBuilder("[");

            for (int i = 0; i < arr.length; i++) {
                if (i==arr.length-1) {
                    sb.append(arr[i]);
                }else{
                    sb.append(arr[i]).append(",");
                }
            }
            sb.append("]");
            return sb.toString();
    }
}
